Piston-bing



H. J. CRINER.

, PISTON RING.

APPLICATDN FLED JUNE l2, 1920.

fwn?? Patented June 14, 1921.

UNITED STATES PATE-NT oFFics.

EARLY J'. CBINEB, 0F HOLINE, ILLINOIS, ASSIGNOB 0F ONE-HALF TO JAMES 1I.

' BOBmSON AND ONE-HALF T0 JOHN W. BYBEE, BOTE 0F MOLINE, ILLINOIS.

PIBTON-RING.

' citizen of the United States and a resident of Moline in the county ofock Island and Stato of Illinois, have invented certain new and usefulIm rovements in Pistomings, of which the following is a specification,reference being had to the accompanying drawin Y y' invention relates topiston rings and particularly to the type of piston ring in-ordinary usein internal combustion engines. As is well understood by those skilledin the art, the eiiciency of an'internal combustion engine depends verydirectly upon thecontinued proper lit of the piston within the cylinder.f the fit is poor, then `the lubricating oil which must be splashed orotherwise su plied for lnbricatin the bearing arts o the piston within te cylinder is awn into the cylinder and there results in a too heavyexplosive mixture, as well as in -an excessive deposit of carbon uponthe walls of the cylinder. A poor fit of the piston results further in afailure to draw in a full charge of explosive mixture upon the suctionstroke, to a higher degree even in a failure to obtain propercompression, and upon :both the compression and the power strokes in aloss of power by the escape of gases past the piston. It is the objectof my invention to provide a iston ring of a novel form which shall be eective and shall continue for a long time to remain eifective for'securing the desired close working t between the piston and the cylinderso as to prevent leakagebetween the piston'and the walls of thecylinder. The means by which I have accomplished my object isillustrated in the drawings and isy hereinafter specifically described.That which I believe to be new and desire to secure by Letters Patent isset forth in the claims.

In the drawings,-

Figure 1 is a side view of a piston ring comprising my improvedconstruction;

Fig. 2 is a cross section taken on a murh enlarged scale at line 2-2 ofFig. 1, being Fig. 5 is an enlarged' detail being a pers'pective view ofthe u permost end orticn' of the split ring of ig. 3 as seenV rom apoint diagonally below and to the right of such portion; and i Fig. 6 isan enlarged detail, being a pers ective view of the. lowermost portionof t e the split-ring of Fig. 3 as seen from a point diagonally aboveand at the left. 4

Referrin to the several figures of the drawings; 1n which correspondingparts are indicated by the same reference characters,- 10 indicates apiston ring which in the construction shown is of a form in which thering is made heavier at one side than at' the other. As is clearly shownin Fig., 3, the ring 10 comprises circumferentially-extending endportions 11 and l2 which are arranged side by side with their side edgesin contact with each other. In the respects so far described, the rin isof the ordinary eccentric expansible lalplypint form.

For rendering my proved piston ring more effective `thanthe Ordinar-yring for closingV the space between the piston and the cylinder walls, I,have provided in the outer face of my ring a continuous closed groovewhich extends completely, about the ring. This roove comprises acircumferentiallyexten ing groove portion 13 and cross groove portions14 and 15 in the end portions 11 and 12 respectively of the ring. Thecross Patented June 14, 1921. v

Application 'led June 12, 1920. lSerial No. 388,547.

groove portions 14 and 15 open at the sides u of the end portions 11 and12 respectively, the cross groove portion 15 being elongatedcircnmferentially of the ring. The cross groove portions 14 and 15 areso positioned with respect to each other that whenthe ring is in itscontracted condition as' shown in Fig. 3, the cross oove ortin 14communicates with the e ongate groove ortion 15 near one end thereof. Aswill readily understood, as the rin 10 is permitted to expand to andbeyond 51e position shown 1n Fig. 4, the groove portion 14 travels alongthe elongated groove portion 15 so as to maintain communicationtherewith at all times. My structure accordingly insures at all times acontinuous closed groove extend in entirely about the ring.`

51s will be readily understood, as a piston equipped with one or more ofmy improved rin is moved in and out of its cylinder, oil wil be pickedup by the groove in the piston ring serving as a seal between the ringand the Walls of the cylinder. By reason of having the groove in one endportion in communication with the groove in the other end portion of thesplit ring, .the oil in the groove serves also to seal the joint of thering and to sezil between that portion of the ring ani the Wall of thecylinder. As the ring Wears on its out-er ,face and expands to maintainyielding Contact with the walls of the cylinder, the ring of oil ismaintained unbroken by reason of the elongation of one of thecommunicating openingsl as above described. By the provislon of a ringof oil in this manner about the outer face of the piston ring, s. veryeffective seal is provided increasing very materially the eiiciency ofthe piston ring for closing the space between the piston and thecylinder wall, and by providing the con tinned communication as therings expands the effectiveness of the ring is maintained for u longperiod until the ring is very materially worn.

iiVhnt I claim as my invention and desire to secure by.Letters Patent,is-

l. A piston ring comprising two circumferentinlly-extending portionsarranged side by side, euch of said portions being provided with :icircumferentiallyextending groove in its outer faire, with the groove'in euch ot' Said portions opening nt the side ot' such yportion andthere communicating with the groove in the other portion.

2. A piston ring comprising two circumferentinlly-extending poi-tions:irrnnged side by side, ouch of Suid portions being provided with ncircumferentiaily-extending groove in its outer face, with the groove ineuch ot' said portions opening zit the sido of such portion and therecommunicating with the groove in the other portion, the opening at theside of one of siiid ring portions being elongated circumferentially ofthe ring whereby the communication between said groove portions isnniintnincd :is siiid ring portions move longitudinnlly with respect toeach. other.

3. An expnnsilile piston ring comprising cirr'urn-ferentinlly-cxtcndingend portions :irranged side `by side, `said ring having a groove in itsouter fece extending completely thereabout with communication betweenthe end portions of the groove effected by openings at the sides of theend portions of the ring. v

4. An expansible piston rin comprising oiroumferentially-extending enportions arranged side by side, said ring having a. groove in its outerface extending oompletely thereabout with communication between the endportions of the groove effected by openings at the sides of the endportions of the ring, one of said openings being elongatedcircumferentially and the openings being so positioned with respect toeach other that the opening in one end portion is located near one endVof the elongated opening in the other end portion when the ring iscontracted and is located near the other end ot' said elongated openingwhen the ring is i in its expanded condition.

5. An expansible piston Vring provided with n groove in its outer facehaving its end portions in communication with each other when the ringis in expanded condition for forming n continuous closed groovecompletely about the ring.

6. n expiinsible piston ring li-.iving il. groove in its outer taceextending circumferentizilly Yfrom :i point neiir one side :it one endportion to a point neiir the other side at the other end portion, undhiiviii'g cross groove portions which communicate with czirli other nmlwith the ,circiiinfercntinlly# extending groove for completing ncontinuons rloscd groove entirely about the ring.

7. An expiinsilile 'piston ring hiiving a. groove in its outer fnceextending circiimt'cr uni iai Il v troni :t point noni' one side nt oneend portion to l:t point ncnr the other side :it thc other end portion,:ind 4having cross groove portions which communicate `with thecirriinifciciiti@ly-extending groove and romniniiiriitc with cach otherboth with the ring in its contracted con-dition und with -tlie ring invarious degrees of expanded condition for completing :it all times econtinuous groove entirely :ihout the rlng.

HARRY J. CRINER.

